1. Sufficiently significant to affect the whole world
   - earthshaking, world-shaking, world-shattering

See also: important, significant

• split-pea
• split-pea soup
• splitsaw
• splitsville
• splitter
• splitting
• splitworm
• splodge
• splosh
• splotch
• splotched
• splotchy
• splurge
• splutter
• Spock
• Spode
• Spodoptera
• Spodoptera exigua
• Spodoptera frugiperda
• spodumene
• spoil
• spoilable
• spoilage
• spoilation
• spoiled